Last Known ActivityHe was the bombardier on crew #11 in the Doolittle Raid.
He was cremated but the location of his ashes is unknown.

His DFC citation:Awarded for actions during World War II
The President of the United States of America, authorized by Act of Congress, July 2, 1926, takes pleasure in presenting the Distinguished Flying Cross to Sergeant William L. Birch (ASN: 6561172), United States Army Air Forces, for extraordinary achievement as Bombardier of a B-25 Bomber of the 1st Special Aviation Project (Doolittle Raider Force), while participating in a highly destructive raid on the Japanese mainland on 18 April 1942. Sergeant Birch with 79 other officers and enlisted men volunteered for this mission knowing full well that the chances of survival were extremely remote, and executed his part in it with great skill and daring. This achievement reflects high credit on himself and the military service.